Suppose the Proportion of First Year Students at a Particular $\mathrm { P } 1$

Essay

Suppose the proportion of first year students at a particular university who purchased used textbooks in the past year is $\mathrm { P } 1$ and the proportion of second year students at the university who purchased used textbooks in the past year is $\mathrm { P } 2$ .A study found a 95% confidence interval for $p _ { 1 } - p _ { 2 }$ is $( 0.237,0.421 )$ Does this interval suggest that first year students are more likely than second year students to buy used textbooks? Explain.